Russian plane crash

A photo provided by the Russian Emergency Ministry's press service shows the site of the Boeing 737 passenger aircraft crash at the international airport in Kazan, Russia.

A photo provided by the Russian Emergency Ministry's press service shows the site of the Boeing 737 passenger aircraft crash at the international airport in Kazan, Russia. (Russian Emergency Ministry Press / EPA)

A photo provided by the Russian Emergency Ministry's press service shows the site of the Boeing 737 passenger aircraft crash at the international airport in Kazan, Russia.